Comment 36 for bug 787821

Like TiGR wrote in comment #28, this only happens to me once on every boot, usually a few minutes after logging in and typing something, for instance in Pidgin. At a random press of the Enter key, X restarts before the message I wrote is sent, meaning the key stroke never reaches the application, as far as I understand it. By "X restarts" I mean suddenly all running applications are killed and Ubuntu goes back to the graphical login prompt.

Oddly enough, if Audacious was running before the crash and I relaunch it afterwards, it warns me that another instance of itself may already be running. Ignoring the warning allows Audacious to run properly. Maybe a lock file of some sort the application wasn't able to release or delete before X crashed?

This issue started happening around May or June 2011, if I recall correctly, and never happened in previous Ubuntu versions (using 11.04 at the moment).